Keep your kitchen cutlery performing at optimal level with the whetstone sharpener from Wusthof. Made from blue and white ceramic, this double sided whetstone is super fine dual grit which restores dull edges and keeps knife blades razor sharp. The dual grit whetstone features a coarse 3000 grit side for edge maintenance and presharpening, while the super fine 8000 grit side removes fine burrs from the blade and hones the edge. It even polishes the knife making it a beautiful and fully functional tool. Use this Wusthof whetstone with water to make sharpening smoother while removing the excess blade debris. Guaranteeing satisfaction, this ceramic whetstone is backed by a manufacturer's lifetime warranty.